A non-destructive reverse-bias second breakdown tester for testing semiconductor devices such as transistors and thyristors that have a base-collector-emitter configuration. The tester basically comprises a socket for ...

A multi-resonant-switching network that operates under switching conditions that are favorable to both the active switch and the diode that constitute the switch. In a zero-current multi-resonant switch, the resonant circuit ...

A multi-loop controller for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage. The controller includes a sensor circuit for sensing the output voltage of the converter. ...

A modal domain optical fiber sensor for vibration monitoring and as a mechanical motion detector. A laser that focuses coherent light through a lens into one end of a multimode optical fiber. The fiber is secured to a ...

A half-bridge zero-voltage-switched multi-resonant converter. The converter basically comprises a device for converting an input voltage signal to a DC output signal to be imposed across a load. The device includes input ...

The invention is a heat flux gage applied to a surface, for the measurement of surface heat transfer. All elements of the gage are thin films, deposited on the surface by sputtering or an equivalent process. The gage ...

A method is provided for detecting the presence of C. difficile toxin A. Stool or other appropriate specimen is contacted with a reagent containing an available non-reducing galactose-alpha-1-3-galactosyl structure, which ...

A multiple tube holder is suspended at the upper end on a frame so that the lower end can pivot through a small arc about a horizontal axis adjacent the upper end of the holder. A motor is connected to the lower end of the ...

A family of quasi-resonant converters is disclosed as comprising a voltage source, a transformer having primary and secondary windings, and a switch for periodically coupling the voltage source to the primary winding, ...